fork() vs vfork()

["kjlin" <kj.lin@viditec-netmedia.com.tw>]

Hi all,

 

How does linux-mips treat the vfork() function?

I can see the fork() implemented in syscall.c as following:

 

save_static_function(sys_fork);
static_unused int _sys_fork(struct pt_regs regs)
{
        int res;

        res = do_fork(SIGCHLD, regs.regs[29], &regs, 0);

        return res;
}

 

But i can't see anything about vfork/sys_vfork in mips platform.

However, the vfork() was implemented as sys_vfork in other architecture.

Such as arm platform:

asmlinkage int sys_vfork(struct pt_regs *regs)
{
        return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0);
}

 

Why not do the same "sys_vfork" in linux-mips?

Does it mean that MIPS does not support vfork() or vfork() is equal to fork() in MIPS platform?

Thanks,

KJ